Seamus O'Domhnaill was a consultant urological surgeon in Limerick, Ireland. He was born in Cork on 22 January 1923, the second son of Padraig O'Domhnaill, a school inspector, and Mary O'Domhnaill née Cotter. He attended national schools in Glasheen and Fermoy, Cork, and then Christian Brothers secondary schools, also in Fermoy and Cork city. He then studied medicine at University College, Cork, from 1940 to 1946, qualifying MB BCh BAO. He was a house surgeon at the North Charitable Infirmary, Cork, at Providence Hospital, St Helens, Lancashire, and at the David Lewis Northern Hospital, Liverpool. He was then a resident medical officer and registrar at Liverpool Children's Hospital. He went on to hold posts as a surgical registrar at the General Hospital, Burnley, and St Helens Hospital. He subsequently returned to Ireland, where he was appointed county surgeon for County Tipperary. He then became a consultant surgeon for the Mid-Western Health Board, at the Regional Hospital, Dooradoyle, Limerick. He gained his FRCS in 1951. He was an examiner for the final fellowship examination of the Royal College of Surgeons in Ireland. He was a fellow of the Royal Academy of Medicine in Ireland, of the Association of Surgeons of Great Britain and Ireland, and of the International College of Surgeons, and an associate fellow of the British Association of Urological Surgeons and the Irish Society of Urology. Outside medicine, he was an international judge in pointer and setter trials, and trained gun dogs. He enjoyed deep sea fishing and shooting. In 1950 he married Ellen Fenton, who was also medically qualified. They had three girls and two boys. Three of their children followed their parents into medicine. Tragically, Seamus O'Domhnaill died on 1 November 2006 after being trampled by a herd of cattle while out walking his dog. He was 83.